Discovered Attack

In chess, a discovered attack is a direct attack revealed when one of your pieces moves out of the way of a long range Attacker.

In the following position, my opponent played fxe5 creating a discovered attack against my Queen. This was a blunder, however, as it allowed me to create a discovered attack of my own. 

A Sweet Double Discovered Double Checkmate! I say Double Discovered because the pawn capture discovered control of g5 by the Queen's Bishop, as well as the Discovered Check from the Rook.

Let me know in the comments about a favorite Discovered Attack from your own games.